They typically share kakaotalk contact not the phone #. Discreet girls have a second kakaotalk to separate her private life (w/ friends and family) from work life (w/ po, employer, and mongers)
I can tell by their profile whether the account is her personal one or a business one.
Girls by default will communicate just to make your repeated visit. Yes as part of marketing.
they see at least a few 10s mongers regularly if not 100, so it should be very tiring job just to ping and pong to each just for fun. I know this so I restrain myself and seldom text her. I usually text to check when she’s coming back from pink vacation.
you should be special if you want to text and chit chat just for fun. Communication is important so chances are high if you are a Korean. Or if you look very attractive.
I do not recommend texting for fun with girls- In the end, it only leaves scar on your heart at best. (You like her, and you date, but you don’t want to marry and then done)